Carbureter for an explosive-engine.



LOWELL o. FREEMAN, or KALAMAZOO, MICHIGAN.

CARBURETER FOR AN EXPLOSlVE-ENGINEQ Specification of Letters Patent.

Patented April 23, 1907.

Application filed December 19,1906. Serial No. 348.676.

To all whom it may concern.-

Be it known that 'I, LOWELL C. FREEMAN, acitizen of the United States, residing at the city of Kalamazoo, county of Kalamazoo, State of Michigan, have invented certain new and useful Improvements in Carbureters for an Explosion-Engine, of which the following is a specification.

This invention relates to improvements in carbuieters or an explosionengine.

"The main object of this invention is to provide an improved carburetor for an explosion engine in which the richness of the explosion mixture, that is, the proportions of air and fuel, is effectively and automatically controlled, although the speed of the engine and the load may vary reatly.

Further objects, ant? objects relating to structural details, will definitely appear from the detailed description to follow.

I accomplish the objects of my inventionby the devices and means described in the following specification. The invention is clearly defined and pointed out in-the claims.

A structure embodying the features of my invention is clearly illustrated in the accompanying drawing, forming a part of this specification, in which, 1

Figure 1 is a detail vertical section of a structure embodying the features of my invention, taken on a line corres onding to line 1-'-1 of Fig. 2, looking in the ection of the little arrows at the ends of the section lines. Fig. 2 is a detail side elevation, partially in vertical section.

In the drawing, similar reference characters refer to similar parts throughout both views.

Referring to the drawing, 1 represents the air inlet havin a fuel supply nozzle 19 projecting upwar ly into the same whereby, as the air is drawn'through the inlet, the fuel is drawn from the delivery nozzle.

2 represents the cylinder pipe, the cylinder not being here illustrated. The throttle valve 6 is arranged within the pipe 2, the same bein preferably mounted.on a suitable shaft-Iike stem, as clearly appears from the drawing. An auxiliary air inlet is provided between the carbureter and the throttle valve. A pair of valves are provided for controlling the inlet of air at this point. This preferablyconsists of a cylindrical casing 3, open at its outer end with its inner end opening into the pi e. Within this casin are cylindrical tub ar valves 14 and 15, t e valve 15 being slidably arranged within the casin and the valve 14 being slidably arrange within the valve 15.

The valve 14 is provided with a plurality of longitudinal ports 16 preferably triangular in form, the inner ends of the ports being the larger. The valves co-act so that their movement relative to each other opens or closes these ports, the outward movement of the member 14 accomplishing this result, or the inward movement of the member 15. The valve 14 is connected by the rod 13 to the governor mechanism so that it is drawn outwardly as the s eed of the engine increases. As the style of 1; 1e governor and the connec tions by which this is accomplished form no part of this invention, I have not here illustrated the same.

The valve 15 is connected to the throttle valve preferably as follows: On the valve stem 5 of the throttle valve is an arm 7 which is connected by the link 8 to the arm 10 on the rock shaft 12, the rock shaft being carried by a suitable arm 4. The.arms 11 which are rigidly connected to the rock shaft engage suitable pins 17 projecting from the collar 18 secured on the outer end of valve 1 5. Through this connection described, when the throttle valve is opened or closed, the valve 15 is opened or closed.

A turn-buckle 9 is provided for the link 8 so that it can be adjusted to open the valve the required amount. As the velocity of the air through inlet pipe 1 increases the ,quantity of fuel drawn from the spray nozzle 19 increases in a greater proportion than the quantity of air passing through said inlet pipe 1 and conversely. This increased ve locity in inlet pi e 1 is caused either by mcreased speed of t e motor or by further opening of the throttle valve 6 or by both.

Then the object of my invention is by suit able valves to keep the ratio of the quantity of fuel drawn from the spray nozzle 19 to the total quantity of air passingthrough both the main inlet pipe 1 and the auxiliary a1r valves 1415 constant. ,The amount of opening ofvalves 14-15 which compensate the quality of the mixture for changlng veloci ties is a function of the two variable factors which are the cause of the cha ing velocities, namely, the position of t e throttle valve and the speed of the en ine.

In operation the valve 15 1s controlled by the operation of the throttle, 'it beingopened .or moved inwardly to uncover theports-1d in said casing, an inner tubular valve adjustaccount of its compactness and simplicity in construction; also the ease with which the parts may be accurately adjusted to secure the desired result. I desire to remark, however, that the structural details of my invention may be very greatly varied.

Having thus described my invention, What I claim as new and desire to secure byLetters Patent is:

1. In a structure of the class described, the combination with a carbureter, of a cylinder pipe; a throttle valve therefor; an auxiliary air inlet located between said carbureter and throttle valve, comprising atubular casing, an-outer tubular valve adjustably arranged in said casing, an inner tubular valveadjust-- ably arranged within said outer valve, said inner valve having longitudinal inwardly expanding ports therein and being arranged to e actuated by an engine governor; and connections for said outer valve to said throttle valve comprising an arm on said throttle valve, a rock shaft, an arm thereon, a connecting link on said arms, means for adjusting saidlink, projecting pins on said outer valve, and forked arms on said rock shaft arranged to engage said pins, for the purpose specified.

j 2. In a structure of the class described, the combination with a carbureter, of a cylinder plipe; a throttle valve therefor; an auxiliary 1 et located between said carbureter and throttle valve, comprising a tubular casing, an outer tubular valve adj ustably arranged in said casing, an inner tubular valve adjustably arranged within said outer valve, said inner valve having longitudinal inwardly expanding ports therein and 'being arranged to e actuated by an engine governor; and connections for said outer valve to said throttle valve comprising an arm on said throttle valve, 2, rock shaft, an arm thereon, a connecting link on said arms, means for adjusting said link, and an arm on said rock shaft connected to said outer valve for the purpose specified.

3. In a structure of the class described, the combination with a carbureter, of a cylinder pipe; a throttle valve therefor; an auxiliary air inlet located between said carbureter and throttle valve, comprising a tubular casing, an outer tubular valve adjustably arranged ably arranged withinsaid outer valve, said inner valve having longitudinal inwardly expanding ports therein and being arranged to be actuated by an engine governor; and con- 1 nections for said outer valve to said throttle valve comprising an arm on said throttle valve, a rock shaft, an arm thereon, a connecting link on said arms, and an arm on said rock shaft connected to said outer valve, for the purpose specified.

4. In a structure of the class described, the combination with a carbureter, of a cylinder pipe; a throttle valve therefor; an auxiliary air inlet located between said carbureter and throttle valve, comprising a tubular casing, an outer tubular valve ad justably arranged in said casing, an inner tubular valve adjustably arranged within said outer valve, said inner valve having longitudinal inwardly exanding ports therein and being arranged to be actuated by an engine governor; and connections for said outer valve to said throttle valve, for the purpose s ecified.

In a structure of t 1e class deseribed,-the combination with a earbureten'of a cylinder pipe; a throttle valve therefor; an auxiliary air inlet located between said carbureter and throttle valve, comprising a tubular casing, an outer tubular valve adjustably arranged in said casing, an inner tubular valve adjustably arranged within said outer valve, said inner valve having ports therein and being arranged to be actuated by an engine governor; and connections for said outer valve to said throttle valve comprising an arm on said throttle 'valve, a rock shaft, an arm thereon, a connecting link on said arms, means for adjusting said link, projecting pins on said outer valve, and forked arms on said rock shaft arranged to engage said pins, for the purpose specified.

6. In a structure of the class described, the combination with a carbureter, of a cylinder pipe; a throttle valve therefor; an auxiliary I air inlet located between said carbureter and r throttle valve, comprisinga tubular casing, an outer tubular valve adjustably arranged within said casing, an inner valve adj ustably arranged within said outer valve, said inner valve having orts therein and being arranged to be actuate by an engine governor; and connectionsfor said outer valve to said throttle valve, comprising an arm on said throttle valve, a rock shaft, an arm thereon, a connecting link on said arms, means for adjusting said link, and an arm on said rock shaft connected to said outer valve, for the purpose specified. l.

7. In a structure of the class described, the combination with a carbureter, of a cylinder pipe; a throttle valve therefor; an auxiliary air inlet located between said carbureter and 5 throttle valve, comprising a tubular casing, an

outer tubular valve adjustably-arranged within said casing, an inner tubular valve adj ustably arranged in said outer'valve said inner valve having ports therein and being arranged to be actuated by an engine governor; and u mnec-tions for said outer valve to said throttle valve, com rising an arm on said throttle valve, a roc shaft, an arm thereon, a connecting link on said arms, and an arm on said rock shaft connected to said outer valve, for the purpose specified.

8. In a structure of the class described, the combination with a carbureter, of a cylinder pipe; a throttle valve therefor; an auxiliary air inlet located between said carbureter and throttle valve, comprising a tubular casing, an outer tubular valve adjustably arranged within said casing, an inner tubular valve adjustably arranged within said outer valve, said inner valve having ports therein and being arranged to be actuated by an engine governor; and connections for said outer valve to said throttle valve, for the purpose specified.

9. In a structure of the class described, the combination with a carbureter, of a cylinder pipe; a throttle valve therefor; an auxiliary air inlet located between said carbureter and valve; adjusting throttle valve; valves therefor; a connection for one of said valves to the said throttle means for said connection, valves being arranged to be. governor mechanism, for the the other of sai controlled by a purpose specific 10. In a structure of the class described, the combination with a carburetor, of a cylinder pipe; a throttle valve therefor; an aux iliary air inlet located between said carbureter and throttle; a pair of valves for controlling said air inlet; and connections for one of said valves to said throttle valve, the other valve being arranged to be controlled by a governor mechanism.

In witness whereof, I have hereunto set my hand and seal in the presence of two witnesses.

LOWELL c. FREEMAN. a. 5.

Witnesses: v LULU GREENFIELD, OTIS A. EARL. 

